<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app">
        <p>{{msg}}</p>
        <h2>{{count}}</h2>
        <input type="text" v-model="msg">
        <h3 v-text = "count"></h3>
        <h2 v-text="msg"></h2>

    </div>
    <script src="vue/dep.js"></script>
    <script src="vue/watcher.js"></script>
    <script src="vue/compiler.js"></script>
    <script src="vue/observer.js"></script>
    <script src="vue/vue.js"></script>
    <script>
      let vm = new Vue({
          el:"#app",
          data:{
            msg:"hello",
            count:100,
            person:{
                num:2
            }
          }
      })
    //   console.log(vm.msg = {a:"123"})
    </script>
</body>
</html>